Di‐, tri‐substituted, and spiro‐fused 2‐sulfonylimidoyl‐1‐phthalimidoaziridines are transformed to di‐, tri‐substituted, and condensed N‐sulfonylimidazoles upon thermolysis. This ring expansion is accompanied by an intramolecular 1,3‐sulfonyl shift.

中文翻译：

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2-磺酰氨基亚胺基-1-邻苯二甲酰亚胺基氮杂环丁烷的热环扩展成N-磺酰氨基咪唑

在热解后，二，三取代和螺旋稠合的2-磺酰亚胺基1-1-邻苯二甲酰亚胺基氮杂环丁烷转化为二，三取代和缩合的N-磺酰亚胺基咪唑。这种环的扩张伴随着分子内的1,3-磺酰基转移。